Willow Emerald Damselfly
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| Chalcostes viridus |
The Willow Emerald Damselfly (Chalcostes viridus) is a type of damselfly.
[edit] Identification
Both sexes are mainly metallic green, like other damselflies, but larger, darker and without pruinescence. The pterostigma is pale brown and outlined in black. The thorax has thin yellow antehumerals and broader yellow stripe above a thin black line on each side;the upper edge of the stripe is irregular, often with a black spur.
Male - The abdomen is very long. The lower anal appendages are less than half the length of the upper which are a distinctive pale yellow with black tips.
Female - The ovipostor is longer than in Scarce Emerald Damselfly.
[edit] Behaviour
Males defend vertical territories in marginal trees. They often stray from water. The eggs are laid into incisons in the bark of overhanging branches, resulting in distinct oval galls.
[edit] Breeding Habits
Mainly ponds and canals, with overhanging willows alders or birches, which are used for breeding.
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